To find a discount Halloween costume I highly recommend looking for them in a second hand thrift store such as Salvation Army or Goodwill. A lot of times Goodwill has costumes for under $10, most of them not even used.
For Halloween I always prefer something scarier :)
Cosplaytrader.com is a good start! Alright you can make a costume or go to the good will and find a nice costume or you can find some clothes that would go with you costume a kid i know did that and went as a pirate!
I believe the best place to get a halloween costume is from Party City.
They have some at yandy.com, which is a great website for all of your costume needs. If you are looking for some for a younger generation, you can try amazon.com or ebay.com as they will be on for discount prices but still good material.
You can find a mator costume in many stores. Examples would be Walmart or your local Halloween store. A good place to get prices is from Walmart for a mator costume.
Costume Castle
HalloweenExpress and PartyCity are great Halloween costume shops. These stores specialize in party accessories and Halloween attire. You can find a limited selection and cheaper prices if you shop Walmart,Kmart or Target though.
"Costume Express" is a good place to find the costumes you want. If "Costume Express" does not have your wanted costumes, I suggest making your own and there are a lot of accessories out there that match your nephew's needs.
Go to Costumeoutlet.com.
If you are looking information on what would be a good alien costume for Halloween, the best site is on costumezone.com/, they will give you the best costumes.
Yeah, they are not bad. You can always find good coupon on their site. And most of costume are cheap, so not a big risk.
um no it's not